After losing his eyesight, Vincent has become completely different as he was unable to accept what happened to him.
In the first few weeks, he thought that he was still inside the Memory Stone's Trial.
He thought that once he completed it, he would be able to regain his eyesight and that his consciousness hadn't come out of it yet.
Even if Tara and the others came to his side, he thought that it was just part of the trial and didn't think too much of it…
However, it didn't take long before he realized that he has really become blind at this point as depression took over him. Many doctors tried to help him but none of them could cure him.
It wasn't just his eyesight that was taken but his direction in life. What could he do without eyesight?
It wasn't until Divine Doctor Ji came to him and said a few words about his vision being cursed. It wasn't because he has an injury or an illness but it was something else beyond him.